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Test No. 8: Flash High Beam Headlight Feature Does Not Operate

    CAUTION: When handling halogen headlight bulb, DO NOT scratch or drop the headlight bulb, as headlight bulb is pressurized and may bust. DO NOT touch glass part of headlight bulb with your hands. Hold headlight bulb only by the plastic or metal case.
  1. Remove and examine headlight bulb which is not operating. If headlight bulb is okay, go to next step. If headlight bulb is defective, replace headlight bulb and recheck headlight operation.
  2. On models without daytime running lights, go to step  5. On models with daytime running lights, check DRL fuse (7.5 amp). Also, check HEAD LH UPR fuse (10-amp) for driver's side headlight or HEAD RH UPR fuse (10-amp) for passenger's side headlight depending on which headlight is inoperative. DRL fuse is located in fuse/relay box as driver's side front corner of engine compartment. See Figure. HEAD LH UPR fuse and HEAD RH UPR fuses are located in fuse/relay box as passenger's side front corner of engine compartment, just behind headlight assembly. If fuses are okay, go to next step. If any fuse is defective, repair short in wiring for appropriate fuse. See WIRING DIAGRAMS in DAYTIME RUNNING LIGHTS article.
  3. Check Daytime Running Light (DRL) relays No. 2, 3 and 4. See DAYTIME RUNNING LIGHT RELAY  under COMPONENT TESTS. If DRL relays are okay, go to next step. If DRL relay is defective, replace DRL relay and recheck headlight operation.
  4. Check wiring harness and electrical connectors between battery and DRL relays, and between DRL relays and Body Electronic Control Unit (ECU). See WIRING DIAGRAMS in DAYTIME RUNNING LIGHTS article. Body ECU is located at driver's side of instrument panel on the fuse/relay box. See Figure. Electrical connector B4 (25-pin) and electrical connector B5 (25-pin) are located at each side of body ECU and a 12-pin electrical connector at rear of body ECU. See Figure. If wiring harness and electrical connectors are okay, go to next step. If wiring harness or electrical connector are defective, repair as necessary and recheck headlight operation.
  5. On all models, check headlight control switch. See HEADLIGHT CONTROL SWITCH  under COMPONENT TESTS. If headlight control switch is okay, go to next step. If headlight control switch is defective, replace headlight control switch and recheck headlight operation. See HEADLIGHT CONTROL SWITCH  under REMOVAL & INSTALLATION.
  6. Check wiring harness and electrical connectors for high beam headlight which does not operate. See WIRING DIAGRAMS in HEADLIGHT SYSTEMS or DAYTIME RUNNING LIGHTS article. Repair wiring harness or electrical connector as necessary.
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